FLORA OF VIETNAM Urticaceae Elatostema sp. N. Vietnam, Hoa Binh prov., Da Bac distr., near Doan Ket village (20°54′58′'N, 105°03′51′'E). Secondary open broad-leaved evergreen forest along small river at elev. about 650 m a.s.l. Lithophyte herb up to 0.3 m hg on open wet stream limestone rocks along river. Flowers greenish-white. Very common.